<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 消息提示的文案 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top" label-width="100px">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格(元)" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量(kg)" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量(个)" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange"
                style="min-width:250px" placeholder="请先选择商品"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--渲染表单的Item项-->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的后台API地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture"
              :headers="headirObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
  import _ from "lodash";
  export default {
    name: "VueAdd",
    data() {
      return {
        activeIndex: 0,
        addForm: {
          goods_name: "",
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          //商品所属的分类数组
          goods_cat: [],
          // 图片数组
          pics: [],
          // 商品的详情描述
          goods_introduce: "",
          attrs: []
        },
        addFormRules: {
          goods_name: [{
            required: true,
            message: "请输入商品名称",
            trigger: "blur"
          }],
          goods_price: [{
            required: true,
            message: "请输入商品价格",
            trigger: "blur"
          }],
          goods_weight: [{
            required: true,
            message: "请输入商品重量",
            trigger: "blur"
          }],
          goods_number: [{
            required: true,
            message: "请输入商品数量",
            trigger: "blur"
          }],
          goods_cat: [{
            required: true,
            message: "请输入商品分类",
            trigger: "blur"
          }]
        },
        //商品分类列表
        catelist: [],
        // 级联选择框配置对象
        cateProps: {
          label: "cat_name",
          value: "cat_id",
          children: "children",
          expandTrigger: "hover"
        },
        //动态参数列表数据
        manyTableData: [],
        //静态属性列表数据
        onlyTableData: [],
        //上传图片的URL地址
        uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
        //图片上传组件的headers请求头对象、
        headirObj: {
          Authorization: window.sessionStorage.getItem("token")
        },
        //   图片预览
        previewPath: "",
        previewVisible: false
      };
    },
    created() {
      this.getCateList();
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2];
        }
        return null;
      }
    },

    methods: {
      // 获取所有商品分类数据
      async getCateList() {
        const {
          data: res
        } = await this.$http.get("categories");
        if (res.meta.status !== 200) {
          return this.$message.error("获取商品分类数据失败！");
        }
        this.catelist = res.data;
        // console.log(this.catelist);
      },

      //级联选择器选中项变化，会触发这个函数
      handleChange() {
        //   console.log(this.addForm.goods_cat);
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = [];
          this.$message.info("请选择三级商品!");
        }
      },
      // tab页切换前后的回调函数
      beforeTabLeave(activeName, oldActiveName) {
        // console.log(activeName);
        //   console.log(oldActiveName);
        if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
          this.$message.error("请先选择商品分类!");
          return false;
        }
      },
      // tab标签页切换事件
      async tabClicked() {
        // console.log(this.activeIndex);
        if (this.activeIndex === "1") {
          const {
            data: res
          } = await this.$http.get(
            `categories/${this.cateId}/attributes`, {
              params: {
                sel: "many"
              }
            }
          );
          if (res.meta.status !== 200) {
            return this.$message.error("获取动态参数列表失败！.");
          }
          // 保存数据
          res.data.forEach(item => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
          });
          this.manyTableData = res.data;
          // console.log(this.manyTableData);
        } else if (this.activeIndex === "2") {
          const {
            data: res
          } = await this.$http.get(
            `categories/${this.cateId}/attributes`, {
              params: {
                sel: "only"
              }
            }
          );
          if (res.meta.status !== 200) {
            return this.$message.error("获取静态属性失败！.");
          }
          // console.log(res.data);
          this.onlyTableData = res.data;
        }
      },
      // 处理图片预览效果
      handlePreview(file) {
        //   console.log(file);
        this.previewPath = file.response.data.url;
        this.previewVisible = true;
      },
      // 图片上传成功的回调函数
      handleSuccess(response) {
        const picInfo = {
          pic: response.data.tmp_path
        };
        this.addForm.pics.push(picInfo);
        //   console.log(this.addForm.pics);
      },
      // 移除图片的回调函数
      handleRemove(files) {
        //1，获取将要删除的图片的临时路径
        //2，从pics数组中，找到这个图片对应的索引值
        const index = this.addForm.pics.findIndex(
          v => v.pic === files.response.data.tmp_path
        );
        //3，调围数组的splice方法，把图片信息对象，从pics数组中移除
        this.addForm.pics.splice(index, 1);
        //   console.log(this.addForm.pics);
      },
      // 添加商品事件
      add() {
        //   console.log(this.addForm);
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) {
            return this.$message.error("请填写必要的表单项！");
          }
          // 添加的业务逻辑 (深拷贝一份数据)
          const form = _.cloneDeep(this.addForm);
          form.goods_cat = form.goods_cat.join(",");

          //处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(" ")
            };
            console.log(newInfo);
            this.addForm.attrs.push(newInfo);
          });

          //处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            };
            this.addForm.attrs.push(newInfo);
          });
          form.attrs = this.addForm.attrs;
          console.log(form);

          const {
            data: res
          } = await this.$http.post("goods", form);
          if (res.meta.status !== 201) {
            return this.$message.error("添加商品失败！");
          }
          this.$message.success("添加商品成功！");
          this.activeIndex = 6;

          setTimeout(() => {
            this.$router.push("/goods");
          }, 1000);
        });
      },

    }
  };

</script>

<style lang="less" scoped>
  .el-steps {
    margin: 15px 0;
    font-size: 13px;
  }

  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .previewImg {
    width: 100%;
  }

  .btnAdd {
    margin-top: 15px;
  }

</style>
